Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
  • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
  • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
  • C09B57/00—Other synthetic dyes of known constitution
  • C09B57/08—Naphthalimide dyes; Phthalimide dyes
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
  • C09B57/00—Other synthetic dyes of known constitution
  • C09B57/14—Benzoxanthene dyes; Benzothioxanthene dyes
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S525/00—Synthetic resins or natural rubbers -- part of the class 520 series
  • Y10S525/934—Powdered coating composition

Definitions

• the present invention relates to novel colorants for the mass coloring of polymers.
• mass coloring of polar polymers examples being polyamides, polyesters, polycarbonates and ABS
• stringent requirements in terms of their heat stability and light fastness are expected from the dyes used.
• the object of the present invention is, therefore, to provide heat-stable, light-fast and readily polymer-soluble colorants, with fluorescence property.
• the invention provides a compound of the formula (I) in which
• Preferred compounds of the formula (I) are those in which each R 1 and each R 2 is methyl.
• R 3 is hydrogen, methyl, ethyl, C 1-4 alkylcarbonyl or C 2-4 alkenylcarbonyl, more preferably hydrogen.
• R 4 as a bridging group is preferably -NHCOphenyl-, -NHSO 2 phenyl- with the phenyl group bonded to the nitrogen atom of the heterocyclic system.
• R 6 R 7 , R 8 , R 9 are independently hydrogen, chlorine, bromine, methoxy, ethoxy, phenoxy, -NH-C 6 H 4 -OCH 3 , -O-C 6 H 4 -OCH 3 or -S-C 6 H 4 -OCH 3 .
• X is preferably sulphur and n is preferably 1 or 2.
• the present invention also provides a process for preparing the compounds of the formula (I), characterized in that a dicarboxylic acid of the formula (II) or, preferably, one of its functional derivatives, e.g. the acid anhydride or acid halide, is condensed with an amine or the salt of an amine of the formula (III)
• Suitable salts of the amine of the formula (III) are the chlorohydrate or the sulphate.
• Condensation can be conducted without solvent in the melt at temperatures, for instance, of between 150°C and 300°C, preferably up to 250°C, or in an inert solvent at temperatures between 25°C and 300°C, preferably between 100°C and 250°C, in the presence or absence of a catalyst, at atmospheric pressure or under pressure.
• suitable solvents are relatively high-boiling aliphatic or aromatic, substituted or unsubstituted hydrocarbons, examples being xylene (mixture), biphenyl, nitrobenzene, chlorobenzenes, chloronaphthalene, glycol ethers, organic acids and acid amides, especially dimethylformamide, dimethylacetamide or N-methyl-pyrrolidone. If the dicarboxylic acid of the formula (II) is employed in the form of the free acid it is also possible to use water or a relatively high-boiling alcohol, such as ethylene glycol, as solvent.
• a relatively high-boiling alcohol such as ethylene glycol
• catalysts examples include inorganic or organic acids, such as hydrochloric or sulphuric acid, benzenesulphonic, toluenesulphonic acid, or acetic acid.
• organic acids such as hydrochloric or sulphuric acid, benzenesulphonic, toluenesulphonic acid, or acetic acid.
• the salts of organic acids such as sodium or potassium acetate, are in many cases also suitable as catalysts.
• the compounds of the invention are eminently suitable for the coloring of melts of synthetic polar polymers such as, for example, ABS, polyester, polycarbonate or polyamides.
• Polyamides are, for example, polycondensation products or addition polymerization products of dicarboxylic acids and diamines, e.g. of adipic acid and hexamethylenediamine, of lactams, e.g. ⁇ -caprolactam, or of aminocarboxylic acids, e.g. ⁇ -aminoundecanoic acid.
• the polyamide melt mixed with the pigment is brought into its final form by conventional methods - for example, in melt spinning, injection molding, extrusion or film blowing machines.
• novel dyes of formula (I) give a fluorescent coloration in synthetic polar polymers such as, for example, ABS, polyester, polycarbonate or polyamides.
• novel dyes of the formula (I) are extremely stable to the heat stress which is necessarily part of the coloring of synthetic polyamides, and the substrates mass-colored with them also display excellent fastness properties, especially light fastness. Their high polymer-solubility is particularly noteworthy.
• novel compounds of the formula (I) are also suitable as colorants in electrophotographic toners and developers, such as one- or two-component powder toners (also called one- or two-component developers), magnetic toners, liquid toners, polymerization toners and specialty toners (literature: L.B. Schein, "Electrophotography and Development Physics”; Springer Series in Electrophysics 14, Springer Verlag, 2 nd Edition, 1992).
• Typical toner binders are addition polymerization, polyaddition and polycondensation resins, such as styrene, styrene-acrylate, styrene-butadiene, acrylate, polyester and phenol-epoxy resins, polysulphones, polyurethanes, individually or in combination, and also polyethylene and polypropylene, which may comprise further constituents, such as charge control agents, waxes or flow assistants, or may be modified subsequently with these additives.
• polyaddition and polycondensation resins such as styrene, styrene-acrylate, styrene-butadiene, acrylate, polyester and phenol-epoxy resins, polysulphones, polyurethanes, individually or in combination, and also polyethylene and polypropylene, which may comprise further constituents, such as charge control agents, waxes or flow assistants, or may be modified subsequently with these additives.
• novel compounds of the formula (I) are suitable, furthermore, as colorants in powders and powder coating materials, especially in triboelectrically or electrokinetically sprayable powder coating materials which are used for the surface coating of articles made, for example, from metal, wood, plastic, glass, ceramic, concrete, textile material, paper or rubber (J.F. Hughes, "Electrostatics Powder Coating” Research Studies, John Wiley & Sons, 1984).
• Powder coating resins that are typically employed are epoxy resins, carboxyl- and hydroxyl-containing polyester resins, polyurethane resins and acrylic resins, together with customary hardeners. Combinations of resins are also used. For example, epoxy resins are frequently employed in combination with carboxyl- and hydroxyl-containing polyester resins.
• Typical hardener components are, for example, acid anhydrides, imidazoles and also dicyanodiamide and its derivatives, blocked isocyanates, bisacylurethanes, phenolic and melamine resins, triglycidyl isocyanurates, oxazolines and dicarboxylic acids.
• novel compounds of the formula (I) are suitable as colorants in ink-jet inks, both aqueous and non-aqueous, and in those inks which operate in accordance with the hotmelt process.
• 16.7 parts of benzo[k,l]thioxanthene-3,4-dicarboxylic anhydride are suspended in 150 parts of N,N-dimethylacetamide. 15.15 parts of the following amine and 0.1 parts of para -toluenesulfonic acid are then added to the suspension, and then heated at reflux for 24 hours. The suspension is then cooled to 25°C and filtered. The cake is washed with dimethylacetamide, alcohol and dried. This gives 22.8 parts of an orange-colored powder.
• 100 parts of polycaprolactam in the form of a powder are mixed with 0.1 and with 1.0 part respectively of the dye from Example 1 in powder form in a drum mixer. After a short time, the powder is uniformly distributed and adheres to the granules. After about 10 minutes, the mixture is dried at 120°C for 16 hours, transferred to a melt spinning machine and following a residence time of about 8 minutes is spun to fibers at 275-280°C under a nitrogen atmosphere. The yellow-colored fibers are extremely lightfast.
• Polyester fibers containing 0.5% (w/w) of the colorant described in the example 1 have been prepared and compared against polyester fibers containing 0.5% (w/w) of the S.Y. 98 having the formula according to the following method:
• the polyester is fused and extruded through a drawing plate at constant rate by gears pump regulation.
• the spinning machine is heated during 2 hours at temperatures of 260°C, 262°C, 262°C, 265°C and 265°C under pressure of 80 bars.
• the drawing plate is heated in an oven at 350°C for at least 30 minutes.
• the obtained fibers are recovered on a bobbin.
• the fibers colored with our product give a bright fluorescent yellow color with 15% higher color strength compared to S.Y. 98. Light and weather fastness are excellent.

Applications Claiming Priority (2)

Publications (3)

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Family Applications (1)

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Cited By (5)

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Citations (8)

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• 1998
  • 1998-11-06 GB GBGB9824314.0A patent/GB9824314D0/en active Pending
• 1999
  • 1999-10-26 JP JP30435899A patent/JP2000154190A/ja active Pending
  • 1999-11-03 US US09/431,992 patent/US6277536B1/en not_active Expired - Fee Related
  • 1999-11-04 KR KR1019990048503A patent/KR20000035220A/ko not_active Application Discontinuation
  • 1999-11-04 ES ES99811010T patent/ES2217721T3/es not_active Expired - Lifetime
  • 1999-11-04 DE DE69916213T patent/DE69916213T2/de not_active Expired - Fee Related
  • 1999-11-04 EP EP99811010A patent/EP0999239B1/de not_active Expired - Lifetime
  • 1999-11-04 AT AT99811010T patent/ATE263810T1/de not_active IP Right Cessation

Patent Citations (8)

Non-Patent Citations (1)

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